<?php
echo 12345,"\n";   //10进制的整数
echo 0b1011, "\n";  //2进制整数，以0b开头，后跟0~1数字
echo 567,"\n";
echo 0567,   "\n";   //8进制整数，以0或0o开头，后跟0~7数字
echo 5*8*8+6*8+7;
echo 0x2AF,"\n";    //16进制整数，以0x开头，后跟0~9A~F数字